Post Go back to editing

LT3748 Flyback controller

Hi,

I would like to design LT3748 Isolated power solution to our PoE PSE source.

Following is our specification:

Vin: 14V (+-) 10%

Vout: 48V@250mA

There is a reference design on ADI website(see following link), but its transformer size is too big to fit in our design.We don't need such high power output.

https://www.analog.com/media/en/technical-documentation/user-guides/dc1860bfa.pdf

Based on our Vin/Vout requirement, could you please suggest a suitable solution to us ? or suggest a transformer to us?

Thanks!

TChin

Parents Reply
  • Hi W.G,

    Thank you for your answer. We will change the solution from LT3748 to LT8302-3 as your suggested circuit.

    By the way, the current rating of secondary side of transformer Wurth(750313457) is 48mA~180mA. Do you

    think it is a risk to our design specification 250mA ? (see attached or below picture)

    PDF

    Thanks!

    TChin

Children